A duniyar injina masu nauyi, injinan tona na taka muhimmiyar rawa wajen gine-gine, hakar ma'adinai, da sauran masana'antu daban-daban. Babban abin da ke cikin waɗannan injuna shine pads ɗin tono, waɗanda ke ba da ƙarfin da ya dace da kwanciyar hankali. A al'adance, an yi wa ɗokin waƙa da ƙarfe, amma kwanan nan ...
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